Improvement in pump-plungers and pumps



N. P. SHELDGN.

Pump Plungers and P-umps.

10,140,795 Patentmedluly15v,1873.

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mu nl# UNITED STATES PATENT EEICE.

NATHANIEL P. SHELDON, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR TO HENRY H. WELCH, OF SAME PLACE.

IMPROVEMENT IN PUMP-PLUNGERS AND PUM-PS.

Specification forming part of Letters Patent No. 140,7969 dated July 15, 1873 application filed June 2, 1873.

To all 'whom it may concern:

Be it known that I, NATHANIEL P. SHEL- `DON, of the city and county of San Francisco and State of California, have invented certain new and useful Improvements in Pumps;

and I do hereby declare the following deto make and use my said invention or improvement, Without further invention or experiment.

The nature of my invention consists in the particular construction, combination, and arrangement of devices forming the improvements described in the following specitication and represented in the accompanying drawings.

Figure one (l) is an elevation of a machine embodying my invention. Fig. two (2) is an elevation of a plunger embodying that portion of my invention connected therewith. Fig. three (3) is an elevation of a valveembodying that portion of my invention connected therewith. Fig. four (4) is an elevation ofthe head-piece embodying that portion of my invention connected therewith. Fig. five (5) is a vertical transverse section, showing those parts of the machine which would be cut by a horizontal line drawn vertically through its center.

A is the plunger; B, a valveseat cast with it; B', a detachable valve-seat giving access to the chamber C, in which the valve D plays. E is a discharge-pipe east with, or otherwise attached to, the plunger. F is an air-chamber attached to the pipe E at a point as near as practicable to the plunger. The valve D has a port, G, corresponding in size to the bore of pipe E. The head-piece H', forming the top ot' the pump, furnishes a valve-seat, B, through the ports of which water passes into the chamber opened by the downward stroke of the plunger, the upper portion H of the head-piece, through which the suspensionrods I I pass, is made to tit as closely as practicable to the pipe of the well in which the pump is suspended. K is a packing of leather, rubber, or other material, for preventing the passage of water between the head-piece H and the well-pipe L. The stufng-box M is for packing around the dischargepipe. N is a plug for closing an opening in the headpiece, through which the water may be returned to its natural level by raising the plug. B is a valve-seat with ports for the recep tion of water to the lower part of the pump. O is the driving-rod P, the cylinder. Upon the upwardstroke of the plunger the valves D and C', covering the ports in the valve-seats B and B, are closed by pressure from the discharge upon their respective valves; and the water above the plunger is forced through the ports of the valve-seat B into the chamber C, and thence into the discharge-pipe E; at the same time the opening space between the valve-seats B/ and Bf is being filled through the ports in B". Upon the down-K ward stroke the ports in valve-seat B and Bf and the water belowthe plunger is forced through the ports in the valve-seats B to the chamber C, and thence through the port G in the valve D to the discharge-pipe.

l claiml. In combination with Ithe cylinder l), plunger A, and hollow rod E, the head-piece H and rods I I, for holding the cylinder in the well, pipe or tube L, the whole being constructed and arranged to operate`substantially as described.

2. The head-piece H, provided with a stuffingbox M for the hollow rod E and a hub, to connect it to the head of the cylinder P, substantially as described.

NATHANIEL P. SHELDON.

Witnesses:

FREDERICK E. J oNEs, WILLIAM G. MILLER. 

